JP2015226753A - X線ct装置及びその制御方法 - Google Patents
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Abstract
【解決手段】実施形態のX線CT装置は、第1の検出器と、第2の検出器と、再構成部とを備える。第1の検出器は、X線管から発生されて対象物を透過したX線の強度を検出するエネルギー積分型の検出器である。第2の検出器は、前記X線管から発生されて前記対象物を透過したX線のスペクトルを検出するフォトンカウンティング型の検出器である。再構成部は、前記第1の検出器より検出された第1の投影データと、前記第2の検出器より検出された第2の投影データとを用いてシステム行列方程式を解くことにより、画像を再構成する。
【選択図】図4
Description
実施形態は、上述した実施形態に限られるものではない。
204 X線撮影制御回路
206 メモリ
208 モニター
210 入力装置
212 画像再構成処理装置
214 画像処理装置
310 高電圧発生器
212 画像再構成処理装置
700 CPU
702 メモリ
704 ディスク
706 ネットワークコントローラ
708 ディスプレイコントローラ
710 ディスプレイ
712 入出力インタフェース
714 キーボード マウス
716 センサ
718 アクチュエータ
720 サウンドコントローラ
722 スピーカ
724 記憶装置コントローラ
726 バス
730 ネットワーク
Claims (8)
- X線管から発生されて対象物を透過したX線の強度を検出するエネルギー積分型の第1の検出器と、
前記X線管から発生されて前記対象物を透過したX線のスペクトルを検出するフォトンカウンティング型の第2の検出器と、
前記第1の検出器により検出された第1の投影データと、前記第2の検出器により検出された第2の投影データとを用いてシステム行列方程式を解くことにより、画像を再構成する再構成部と、
を備える、X線CT装置。 - 前記再構成部は、前記第2の投影データを用いて再構成した少なくとも1つのベース画像を用いて、前記第1の投影データをビームハードニング補正し、ビームハードニング補正後の前記第1の投影データと、前記第2の投影データとを用いてシステム行列方程式を解くことにより、前記画像を再構成する、請求項1に記載のX線CT装置。
- 前記再構成部は、システム行列の擬似逆行列を計算することにより、前記システム行列方程式を解く、請求項2に記載のX線CT装置。
- 前記再構成部は、システム行列の加重擬似逆行列を計算することにより、前記システム行列方程式を解く、請求項2に記載のX線CT装置。
- 前記再構成部は、反復コンピュータ断層撮影画像再構成方法により、前記システム行列方程式を解く、請求項2に記載のX線CT装置。
- 前記再構成部は、全変動最小化反復コンピュータ断層撮影画像再構成方法により、前記システム行列方程式を解く、請求項2に記載のX線CT装置。
- 前記再構成部は、Kacmarz反復コンピュータ断層撮影画像再構成方法により、前記システム行列方程式を解く、請求項2に記載のX線CT装置。
- X線管から発生されて対象物を透過したX線の強度を検出するエネルギー積分型の第1の検出器により検出された第1の投影データと、前記X線管から発生されて前記対象物を透過したX線のスペクトルを検出するフォトンカウンティング型の第2の検出器により検出された第2の投影データとを用いてシステム行列方程式を解くことにより、画像を再構成する、X線CT装置の制御方法。
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US14/293,427 US9449385B2 (en) | 2014-06-02 | 2014-06-02 | Reconstruction of computed tomography images using combined third-generation and fourth-generation projection data |
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Cited By (3)
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JP2019520885A (ja) * | 2016-06-07 | 2019-07-25 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | スペクトル及び非スペクトル物質分解を組み合わせることによる定量的撮像の精度及び分解能の向上 |
JP2020127635A (ja) * | 2019-02-08 | 2020-08-27 | キヤノンメディカルシステムズ株式会社 | 医用処理装置、x線ctシステム及び処理プログラム |
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